Gregory Merriweather

Systems Architect and senior telecommunications engineer with 20+ years designing, migrating and operating production voice platforms: SIP/RTP, Asterisk, FreeSWITCH, Kamailio/OpenSIPS, SBCs and carrier interconnects. Co-founded an early Asterisk/IAX VoIP carrier, led Yahoo’s Nortel-to-Asterisk migration of 300K+ voicemail mailboxes across 40+ sites, and now builds AI-assisted observability and self-hosted LLM infrastructure that turns SIP traces and logs into root cause. Simulation-first reverse engineer since 1985.

Senior VoIP / SIP Platform Engineer · AI Integration & Communications Infrastructure at EchoGuard / Batnet / VoIPMonk Labs (2025 – Present)

• Architected and operate a production voice platform with a carrier DID marketplace, AI-driven call routing and real-time observability (SIP, media relay, Node.js, React/TS, PostgreSQL) as sole end-to-end owner.
• Restored a degraded platform (carrier ordering, routing, failure handling); country blocking and spend controls kept fraud loss at $0.
• Built full-stack observability (CDR analytics, call-quality monitoring, carrier-health dashboards), audit scripts and runbooks.
• Designed a self-hosted AI operations stack (Mattermost, OpenClaw, Podman/PostgreSQL, Rocky Linux, Cloudflare Tunnel, coturn) on OpenAI-compatible APIs with Vultr serverless GPU inference and DeepSeek/Qwen fallbacks.
• Built role-based AI agents with durable memory and human-in-the-loop approvals; natural-language observability lets operators query SIP/RTP traces, logs, tickets and carrier events.

VoIP Engineer at VoIP.ms (2025-05 – 2025-08)

• Supported carrier-grade VoIP for global users, improving SIP/RTP security and performance across routing, media and carriers.
• Drove a team shift from “the call failed” to evidence-based root-cause analysis using packet captures, multi-proxy SIP traces and RTP media-path debugging; handled carrier escalations and contributed to routing, DID and failover strategy.

Application Engineer / Sr. Asterisk Developer (Contract) at Resolve Tech Solutions / Akorbi (2022-10 – 2022-11)

• Resolved recurring Asterisk deadlocks and restored service stability; optimized RTP signaling and media flows across Asterisk and Kamailio/OpenSER/OpenSIPS, diagnosing latency and routing defects from traces and packet captures.
• Documented architecture questions and handoff notes, moving stakeholders from symptoms to evidence-backed fixes.

Asterisk Integration Developer at AnswerNet (2018 – 2019)

• Delivered an Asterisk-based omnichannel contact center (voice, SMS, email, chat, voicemail) for 200+ agent workstations, with AWS-backed provisioning, backup and security controls and MySQL-backed voicemail/messaging.
• Integrated CallerReady and DialerIQ via AMI/ARI for real-time call control and agent state; built dialplan for skills-based routing, queue priorities and CRM screen pops.

VoIP & Secure Communications Contractor at CellTrust / IntraEdge (2015-08 – 2015-10)

• Built a horizontally scalable multi-server Asterisk cluster (MySQL realtime, Twilio SIP) with load testing, TLS/SRTP signaling, certificate management and firewall ACLs for regulated secure messaging and voice.

Chief Engineer / VoIP Engineer at Telnexus LLC (2014-02 – 2014-06)

• Ran Kazoo/FreeSWITCH voice infrastructure, carrier connectivity, SIP endpoints and Cisco Meraki networking for a startup.

Founder & Consultant at VoIPMonk (2009 – 2015)

• Led a telecom consultancy delivering VoIP modernization, Asterisk/FreeSWITCH troubleshooting, toll-fraud remediation, capacity planning and TDM/PRI-to-SIP trunking migrations for multiple enterprise clients.

Senior Telecom Engineer at Yahoo! Inc. (2010-08 – 2013-05)

• Technical SME for Fortune 500 telephony across 40+ Asterisk sites globally (Genesys contact center, Cisco AS5400/2821).
• Led the Nortel/Avaya-to-Asterisk migration of 300K+ voicemail mailboxes with zero-downtime weekend cutovers and an 8-day go-live methodology across 40+ sites, including Amman and Toronto.
• Designed Asterisk high-availability architecture (load-balancer rotation, DNS SRV failover, NFS voicemail sync, MySQL replication) across Sunnyvale, New York and Miami.
• Built PHP/MySQL CDR and toll-fraud analytics plus Splunk-driven gateway monitoring with automated TCL/Perl remediation.
• Owned a 30-minute-SLA on-call rotation and CAB change management across Americas, EMEA and APAC.

VoIP Software Developer at Lightyear Network Solutions (2007-08 – 2009-04)

• Built Asterisk/Apache/MySQL/PHP voice services on Linux with OpenVZ multi-tenant containers for carrier and enterprise clients.
• Replaced the old per-user licensed voicemail server with Asterisk, saving ~$20K in licensing.
• Recovered ~$250K from a decommissioned Lucent carrier switch through resale and repurposing.

Co-Founder & Senior VoIP Solutions Architect at The NuFone Network (2001 – 2007)

• Co-founded an early commercial IAX/Asterisk VoIP provider reaching 1,700+ cities/countries at 300+ concurrent calls; built the multi-carrier routing engine, real-time billing, provisioning and custom Asterisk modules.
• Ran SIP/IAX peering with Level3, Broadvox and Global Crossing; owned fraud prevention, capacity and 24/7 uptime.

Systems Engineer at Global Crossing (2000-09 – 2001-09)

• Operated Sun SPARC CDR/billing systems, Veritas storage, NOC Linux and Nagios monitoring for carrier billing reconciliation.

Earlier Experience — Network Analyst; System Administrator; technical roles at Ambit Technology (Ford Global Network / Ford Credit); Backwoods Communications; Ford Motor Company; Detroit Public Schools; YMCA (1994 – 2003)

• Network Analyst, Ambit Technology (Ford Global Network / Ford Credit), 1999–2000.
• System Administrator, Backwoods Communications, 1997–2003.
• Technical roles at Ford Motor Company, Detroit Public Schools and YMCA, 1994–1997.

Computer Science coursework in Computer Science – Central Michigan University